Evidence of Two Resonant Structures in e+e- →π+π-hc

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Evidence of Two Resonant Structures in e+e- →π+π-hc. / The BELLE collaboration.

In: Physical Review Letters, Vol. 118, No. 9, 092002, 01.03.2017.

Research output: Contribution to journal › Article › peer-review

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The BELLE collaboration 2017, 'Evidence of Two Resonant Structures in e+e- →π+π-hc', Physical Review Letters, vol. 118, no. 9, 092002. https://doi.org/10.1103/PhysRevLett.118.092002

APA

The BELLE collaboration (2017). Evidence of Two Resonant Structures in e+e- →π+π-hc. Physical Review Letters, 118(9), [092002]. https://doi.org/10.1103/PhysRevLett.118.092002

Vancouver

The BELLE collaboration. Evidence of Two Resonant Structures in e+e- →π+π-hc. Physical Review Letters. 2017 Mar 1;118(9):092002. doi: 10.1103/PhysRevLett.118.092002

Author

The BELLE collaboration. / Evidence of Two Resonant Structures in e+e- →π+π-hc. In: Physical Review Letters. 2017 ; Vol. 118, No. 9.

BibTeX

@article{393230ea970f4212ab427d322c982086,

title = "Evidence of Two Resonant Structures in e+e- →π+π-hc",

abstract = "The cross sections of e+e-→π+π-hc at center-of-mass energies from 3.896 to 4.600 GeV are measured using data samples collected with the BESIII detector operating at the Beijing Electron Positron Collider. The cross sections are found to be of the same order of magnitude as those of e+e-→π+π-J/ψ and e+e-→π+π-ψ(2S), but the line shape is inconsistent with the Y states observed in the latter two modes. Two structures are observed in the e+e-→π+π-hc cross sections around 4.22 and 4.39 GeV/c2, which we call Y(4220) and Y(4390), respectively. A fit with a coherent sum of two Breit-Wigner functions results in a mass of (4218.4-4.5+5.5±0.9) MeV/c2 and a width of (66.0-8.3+12.3±0.4) MeV for the Y(4220), and a mass of (4391.5-6.8+6.3±1.0) MeV/c2 and a width of (139.5-20.6+16.2±0.6) MeV for the Y(4390), where the first uncertainties are statistical and the second ones systematic. The statistical significance of Y(4220) and Y(4390) is 10σ over one structure assumption.",

keywords = "ENERGY",

author = "{The BELLE collaboration} and M. Ablikim and Achasov, {M. N.} and S. Ahmed and Ai, {X. C.} and O. Albayrak and M. Albrecht and Ambrose, {D. J.} and A. Amoroso and An, {F. F.} and Q. An and Bai, {J. Z.} and O. Bakina and {Baldini Ferroli}, R. and Y. Ban and Bennett, {D. W.} and Bennett, {J. V.} and N. Berger and M. Bertani and D. Bettoni and Bian, {J. M.} and F. Bianchi and E. Boger and I. Boyko and Briere, {R. A.} and H. Cai and X. Cai and O. Cakir and A. Calcaterra and Cao, {G. F.} and Cetin, {S. A.} and J. Chai and Chang, {J. F.} and G. Chelkov and G. Chen and Chen, {H. S.} and Chen, {J. C.} and Chen, {M. L.} and S. Chen and Chen, {S. J.} and X. Chen and Chen, {X. R.} and Chen, {Y. B.} and Chu, {X. K.} and G. Cibinetto and Dai, {H. L.} and Dai, {J. P.} and A. Dbeyssi and D. Dedovich and Muchnoi, {N. Yu} and Nikolaev, {I. B.}",

note = "Publisher Copyright: {\textcopyright} 2017 American Physical Society.",

year = "2017",

month = mar,

day = "1",

doi = "10.1103/PhysRevLett.118.092002",

language = "English",

volume = "118",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "9",

}

RIS

TY - JOUR

T1 - Evidence of Two Resonant Structures in e+e- →π+π-hc

AU - The BELLE collaboration

AU - Ablikim, M.

AU - Achasov, M. N.

AU - Ahmed, S.

AU - Ai, X. C.

AU - Albayrak, O.

AU - Albrecht, M.

AU - Ambrose, D. J.

AU - Amoroso, A.

AU - An, F. F.

AU - An, Q.

AU - Bai, J. Z.

AU - Bakina, O.

AU - Baldini Ferroli, R.

AU - Ban, Y.

AU - Bennett, D. W.

AU - Bennett, J. V.

AU - Berger, N.

AU - Bertani, M.

AU - Bettoni, D.

AU - Bian, J. M.

AU - Bianchi, F.

AU - Boger, E.

AU - Boyko, I.

AU - Briere, R. A.

AU - Cai, H.

AU - Cai, X.

AU - Cakir, O.

AU - Calcaterra, A.

AU - Cao, G. F.

AU - Cetin, S. A.

AU - Chai, J.

AU - Chang, J. F.

AU - Chelkov, G.

AU - Chen, G.

AU - Chen, H. S.

AU - Chen, J. C.

AU - Chen, M. L.

AU - Chen, S.

AU - Chen, S. J.

AU - Chen, X.

AU - Chen, X. R.

AU - Chen, Y. B.

AU - Chu, X. K.

AU - Cibinetto, G.

AU - Dai, H. L.

AU - Dai, J. P.

AU - Dbeyssi, A.

AU - Dedovich, D.

AU - Muchnoi, N. Yu

AU - Nikolaev, I. B.

PY - 2017/3/1

Y1 - 2017/3/1

N2 - The cross sections of e+e-→π+π-hc at center-of-mass energies from 3.896 to 4.600 GeV are measured using data samples collected with the BESIII detector operating at the Beijing Electron Positron Collider. The cross sections are found to be of the same order of magnitude as those of e+e-→π+π-J/ψ and e+e-→π+π-ψ(2S), but the line shape is inconsistent with the Y states observed in the latter two modes. Two structures are observed in the e+e-→π+π-hc cross sections around 4.22 and 4.39 GeV/c2, which we call Y(4220) and Y(4390), respectively. A fit with a coherent sum of two Breit-Wigner functions results in a mass of (4218.4-4.5+5.5±0.9) MeV/c2 and a width of (66.0-8.3+12.3±0.4) MeV for the Y(4220), and a mass of (4391.5-6.8+6.3±1.0) MeV/c2 and a width of (139.5-20.6+16.2±0.6) MeV for the Y(4390), where the first uncertainties are statistical and the second ones systematic. The statistical significance of Y(4220) and Y(4390) is 10σ over one structure assumption.

AB - The cross sections of e+e-→π+π-hc at center-of-mass energies from 3.896 to 4.600 GeV are measured using data samples collected with the BESIII detector operating at the Beijing Electron Positron Collider. The cross sections are found to be of the same order of magnitude as those of e+e-→π+π-J/ψ and e+e-→π+π-ψ(2S), but the line shape is inconsistent with the Y states observed in the latter two modes. Two structures are observed in the e+e-→π+π-hc cross sections around 4.22 and 4.39 GeV/c2, which we call Y(4220) and Y(4390), respectively. A fit with a coherent sum of two Breit-Wigner functions results in a mass of (4218.4-4.5+5.5±0.9) MeV/c2 and a width of (66.0-8.3+12.3±0.4) MeV for the Y(4220), and a mass of (4391.5-6.8+6.3±1.0) MeV/c2 and a width of (139.5-20.6+16.2±0.6) MeV for the Y(4390), where the first uncertainties are statistical and the second ones systematic. The statistical significance of Y(4220) and Y(4390) is 10σ over one structure assumption.

KW - ENERGY

UR - http://www.scopus.com/inward/record.url?scp=85014579664&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.118.092002

DO - 10.1103/PhysRevLett.118.092002

M3 - Article

C2 - 28306302

VL - 118

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 9

M1 - 092002

ER -

ID: 10277090